Here we have demonstrated the setup and operation of a polarisation based 10 user fully connected ed qn, with the resources for a 12 user fully connected ed qn.
The qn demonstrated a minimum polarisation stability duration of \(10.8\)  days through both local and deployed fibre links with network wide aeskr of \(3.3818\)  bps, as shown in Table REF .
Previously, ed qn based on entangled photon pairs with passive polarisation compensation, with deployed fibre links have only shown up to a day of continuous polarisation stability before the qn is reset [1]}.
It is also shown that the links between users with deployed fibres demonstrate similar stability to users with only local fibre links.
This improvement in stability indicates that the limitation of metropolitan scale ed qn is likely to be the polarisation stability of the distribution devices rather than the deployed fibre links.
The large concentration of fibre lengths that sit in a relatively small area within the distribution devices leads to large polarisation drifts from small environment drifts.
Metropolitan scale deployed fibres do not have a large influence on the stability of a qn, and as such scaling qn up to arbitrary deployed links should be possible, to the limit of the fibre loss of each link.
